che #14308 Adding 'IMPORTANT' note to the main Che 6 workspace page w…

…ith a refence to the 'Converting a Che 6 workspace to a Che 7 devfile' documentation

Signed-off-by: Ilya Buziuk <ibuziuk@redhat.com>

src/main/pages/che-6/workspace-admin/what-are-workspaces.adoc

@@ -8,6 +8,9 @@ redirect_from: what-are-workspaces.html
 folder: che-6/workspace-admin
 ---
 
+IMPORTANT: Che 6 workspace configuration format is no longer supported in the latest Che 7 release. Please, follow the 
+link:{site-baseurl}che-7/converting-a-che-6-workspace-to-a-che-7-devfile["Converting a Che 6 workspace to a Che 7 devfile"] documentation in order to update the definition of the workspace and benefit from the latest capabilities.
+
 [id="workspace"]
 == Workspace